INSERT THE MODULES The control unit comes with covers in place and with the following modules already installed:
●Power supply module
●Memory module
●Line module (line board)
●Voice terminal module (station board)
You have already removed the front and top covers to mount the unit on the wall. The power supply module is on the left inside the control unit. See Figure 10. The memory module houses a battery that will preserve all programming for at least four days in case of a power failure. The voice terminal module (station board) has 10 jacks for 10 voice terminal connections, and the line module (line board) has 4 jacks for outside line connections and one jack for auxiliary use. Notice the protective safety latches at the bottom of the line and voice terminal module slots.
FIGURE 10 The control unit modules.
If you did not order a second line or voice terminal module, go on to the next procedure, "Connect the Control Unit to the AC Outlet." However, if you have ordered the additional two modules, insert them now following the instructions below.
CAUTION: Make sure the power cord is unplugged and the power switch on the control unit is set to Off before you insert or remove any modules. You risk damage to the system and the modules if the power is on during this procedure.